Organic milk will not have bovine hormones which is good.
Most milk companines are proud to state that they do not use
hormones and it will say on the carton, even with regular supermarket
brands.
The companies that use bovine hormones were trying to make it illegal
for the companies that dont use them to post on their bottles that they
don't use them Fortunately they haven't gotten very far.
At 16 I would think a young man does not want all those female cow hormones
circulating around. You may want to think about drinking almond milk found in healthfood stores.
Lots of calcium and none of the problems of cows milk
Lots of sugar is not good for you but if you are very active you will be burning most of it.
This is why body builders eat lots of carbs. They need that immediate energy release and carbs
keep sugar available for use a little longer than just plain sugar. If your activity level decreases
so should your carb and sugar intake but I wouldn't worry to much about just eating some fruit and
having a few glasses of milk. There are other things about milk that are of concern.
I have seen this alot in champions swimmers. There carb requirements are huge, more so than most athletes, and they enjoy eathing them. Then when they stop swimming they get fat.
This chart for calcium may be helpful and look at the beans. Lots of calcium there and people ususally eat more than 3 tablespoons. Sardines is a superfood. Eat them a few times a week if you can. Although high in calcium they are one of the best choices for the Omega fats that are so critical to good health, good brain function. https://www.nutritiondata.com/facts/finfish-and-shellfish-products/4115/2
Vegetables the first number is serving size the second is mg of calcium
Broccoli, boiled serving, 85g 34
Watercress, raw small bunch, 20g 34
Curly Kale serving, 95g 143
Okra, stir fried 8 medium 40g 88
Red kidney beans, canned 3 tablespoons, 105g 75
Chick peas, boiled 3 tablespoons, 90g 41
Green/French beans serving, 90g 50
Baked beans serving, 135g 72
Nuts
Almonds 12 whole, 26g 62
Brazil Nuts6 whole, 20g 34
Hazlenuts 20 whole, 20g 28
Sesame seeds 1 tablespoon, 12g 80
Walnuts 12 halves, 40 g 38
Tahini Paste 1 heaped tsp. 19g 129